Metal-working machine



July 29 1924.

1,503,153 U D FOSTER METAL WORKING MACHINE Filed Jan. 13. 19 3 Sheets-Sheet l INVENTOR.

A TTORNEY.

Jul 29 1924.

U. D FOSTER METAL WO KING IMACHINE Filed Jan. 13 1922 3 Sheets-$heet 2 INVENTOR.

ATTORNEY.

July 29 1924.

' u. DQFOSTER METAL WORKING MACHINE Filed Jan. 13, 1922 3 Sheets-Sheet INVENTOR,

' ATTORNEY.

Patented July 29, 1924 URI D. FOSTER, or HARTFORD, CONNECTICUT, AssIGNon TO any: HART & I-IEGEMAN.

MANUFACTURING COMPANY, OF HARTFORD, CONNECTICUT,*A CORIORATION OF CONNECTICUT.

M-ErAL wonKrNG MACHINE. 7

Application filed January 13 1922. Serial No. 528,926 7 ToaZZ-whom it may concern? 7 7 Be it known that I, URI D. Fosrnn, a citizen of the United States, residing at Hartford,

inthe county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Metal-IVorking Machines, of which the following is a specification.

This invention relates to a metalworking machine. The principal object of the invention is to provide means of a highly effective nature, for at once automatically stopping the machine in case an obstruction is met.

the machine being at once stopped in case the stock isnot properly presented for action by the tap or equivalent implement.

In the drawings accompanying and forming part of the present specification I have shown rather fully oneof the several forms of embodiment of the invention, which to enable those skilled in the art to practice the invention will be set forth fully in the following description. Clearly I am not restricted to this disclosure. I may depart therefrom in several respects within the sco-peof the invention defined by the claims followings'aid description.

vReferring to said drawings Figure 1 is'a top-plan view of a machine involving theinvention; .Figs. 2 and 8 are opposite side elevations of themachine as seen for example from the right and left. 1 r a Like characters refer to like parts throughout the several views.

- The different parts o-f'the machine may be carried in any convenient manner, the base or bed' 2: being generally provided for the purposeand comprising ordinarily, a practically rectangular plate. The work support may be. of any suitable kind; that shown is denotedby 8 and it is sustained up,- on the'upper side of the base or bed 2 near an end thereof. As shown it is provided with lateral lugs or ears 4 longitudinally slotted. to receive the screws 5, which are tapped 'into the'base orbed 2. This construction provides for a rotary adjustment when necessary, of the work support 3', the

be not always necessary to-utilize it.

latter being held normally in rigid relation by the. heads of the screws 5 which bind against the lugs 4. The work support 3. I

presents a convenient means for sustaining what may be considered as a work'carrier, which I will hereinafter describe, but which I might note at this point is practically in theform of a slotted table 6, rotative upon the work support 3 and hereinafter with its adjuncts, more fully set forth.

The tool mechanism may be carried in anyconvenient way, the tool support .7 being shown for the purpose and generallyconsist ingof a vertically disposed plate rigid with the base or bed 2 and rising therefrom.

The tool 8 shown is a tap although i; may

s illustrated it is removably held in the .chuck 9 (Fig. 3) rigid with the lower end of the spindle 10, the tool support 7 having superposed bearings or arms 11 to rotatively res ceive the spindlelO. The spindle 10 which. is of compound construction as I .will hereinafter more particularly set forth, in'addition to being rotative, is given an endwise or longitudinal movement and this maybe secured by threading as at 12, the upper section of the spindle, to extend through thenut'13 rigid with'the support or beark loosely connected as at 10", with the lower section of the spindle, so that; should the lower section of the spindle meet an obstruction, its lowerseQ' QI can yield backwardly, without causing any trouble.

As shown the upper section of the spindle 10has rigid with it the pinion 14, in mesh with thespur gear 15. The spur gear 15,

as shown is rigid with the shaft 16, which V has rigid with it the bevel pinion 17, in mesh with the lateral teeth of the gear member 18,

shown as a segment. The segment 18 is sustained for rocking movement upon the support 7. The main shaft is designated by 19 and as shown, is sustainedfor rotary movement upon the upper rearcorner of the support 7, Said shaft 19 has rigidly con-' nected with it a crank arm 20, to the "outer end of which is jointed, as by; pivoting,

The

the link 21 which is likewise united with the segment 18 between the ends thereof, so that when the shaft turns, the crank arm 20 turns with it, and through the link 21 rocks the segment 18.

The workto be acted upon may be of any desired kind and the tool may vary, although as I have hereinbefore set forth, a tap as 8 is shown. The work support is denoted by 3 although strictly speaking the work is not directly carried thereby but rather by an index plate such as the disk 6 which has in its periphery notches 23, thus providing therebetween theperipheral teeth 24. The index plate or disk 6 is given an intermittent movement so as to successfully position the work forsaction by-the tool 8. For the purpose described the .plate or disk 6 may have through it the slots or openings 25 spaced predetermined distances apart. 7 The ntermittent or step-by-step movementof the plate or disk 26 is accomplished through the'a'gency of a pawl 27. The pawl 27 as shown,-is connected for longitudinal adjustment as by screws 28, adapted, to interchangably enter a longitudinal row of perforations 29 in the pawl, and to be tapped 1 into studs 30 rigid with and rising from l the pawl-carrier 31, below the pawl, and the rear end of which is perforated to receive the pivot 32, on which the pawl-carrier 31 and the pawl rigid therewith, can turn. The pawl 27 is held in yielding contact with the disk 6 by the spring arm 33 rigidly connected as by the screw 34, with the pivot 32. The pivot 32 as shown extends downwardly through a. longitudinal slot 35 at the forward end of the bar 36 and is held in purpose. will now be set forth. To the tail end of said bar or slide 36 is jointed the lower branch or arm of the lever 38 pivoted between its ends to the support .or column 7. The upper branch of the lever having a stud 39, enga-geable by-a cam 40 rigid with the shaft 19 and 'to'rotat-e therewith, so that as the shaft turns the lever 38 will-be rocked to impart endwise or longitudinal movement to the bar or slide 36. This is the normal action of the machine. hen however the lever 38 and the bar 36 are thrown out of action, it follows that the index plate or disk 6 will not be rotated, nor will the spindle 10 be rotated as will be hereinafter explained.

There is pinned or otherwise suitably fastened, to the shaft 42 a driver such as the cone pulley 43, illustrated as having three steps and which may be operated from some suitable source of power. The shaft 42 also has loose on it a pinion 44 in mesh with the spur gear 45 loose on the shaft 19. There is rigid with shaft 19 the disk or plate 46, shown as pivotally carrying the pawl or dog 47, which coacts with the collar'48, rigid with the gear 45 and loose on said shaft 19 and having a peripheral notch or slot 49 to receive the tooth 50 of the pawl 47. The disk, wheel or plate 46 and the pawl 47 constitute one. member of afclutch, the complemental member being constituted by the collar 48. The tooth 50 of the pawl 47 is normally held in the notch or slot 49 by the spring 51, connected therewith and also connected with the disk or wheel 46.

The shaft 42 as shown, pivotally supports between its ends the latch 52, the free end of the upper branch of which is adapted to engage under the toe of the pawl or dog 47 to disengage the. pawl or dog from the clutch member or disk 48. To the lower branch of the latch 52 is connected one end of the coiled pullspring 53, the opposite terminal thereof being connected with the base or'bed 2. Said spring under normal action, holds the upper end of the latch 52 in the path of the pawl or dog 47, under the toe of this pawl 47 and against the periphery 'rigid on the bar of slide 36. After the bar or slide is retracted the tripper or actuator 54, strikes the lower arm of the latch 52 and carries the top or upper end thereof from out of the path of the pawl or dog 47. Should the bar or slide 36 remain in its forward position there will be nothing to trip the latch 52 and as a consequence it is caused by the spring 53 to remain in such position as to be engaged by the free end of the pawl or dog 47 as the disk or wheel 46 rotates, thus carrying the tooth 50'out of the notch 49 and permitting the collar 48. and gear 45 to rotate freely on the shaft 19 andin consequence allow all other parts of the machine to remain at rest.

The slide or bar 36 as shown is supported by the bearings 56 and 57, rigid with the support 7, the rear bearing 57 functioning as a stop to limit the rearward movement of the slide or bar 36. The collar 55 adjustable on the bar 36 is provided to retard the rearward movement of said bar, this being necessary to compensate for variations in the sizes of the articles to be tapped. In the illustration given, the disk 6 is intermittently rotated, the amount of each step or intermittent movement being governed by the bar 36, the rearward movement of which is effected by the spring 59 and the forward movement of which is positively eliected through the action of the lever 58, acted on by the cam 48.

What. I claim is:

l. A machine of the class described comprising a power-driving member, a driven member to co-operate with the driving member, a work-carrier, an actuator for the work carrier operable 'in one direction by the driven member, independent means for imparting opposite movement to the actuator, a clutching means between the driving and the driven members, and means for operating the clutching means to throw the driving and the driven members out of working relation in case the actuator should not complete its movement.

2. A machineof the class described comprising a power-driving member, a driven member to co-operate with the driving member, a work-carrier, a clutching member between the driving and the driven members and acting normally to automatically couple the same, a work carrier, a reciprocatory actuator operable by the driven member, a latch to engage the clutching member, and means associated with the actuator for tripping the latch on each complete movement of the actuator to thus permit the mute-hing member to couple the driving and the driven members on each said complete movement.

3. A machine of the class described comprising a power-driving member, a driven member to co-operate with the driving member, a work-carrier, a clutching member between. the driving and the driven mem bers, spring means acting to automatically normally cause the clutching member to couple the drivingand the driven members, a work carrier, a reciprocatory actuator operable by the driven member, a latch to engage the clutching member, and means associated with theactuator for tripping the latch on each complete movement of the actuator to thus permit the clutching member to couple the driving and the driven'members on each said complete movement.

4-. A machine of the classdescribed comprising a. power-driving member, a driven member to co-operate with the driving member, a work-carrier, a clutching member between 'the driving and the driven members and acting normally to' automatically couple the same, awork carrier, areciprocatory actuator operable by the driven member, a latch to engage the clutching member and adjustable means associated with the actuator, for trippingthe latch on each complete movement of the actuator to thus permit the clutching member to couple the driving and the driven members on each complete movement.

5. A machine of the class described comprising a power driving member, a. driven member to co-operate with the driving member, a work-carrier, a pawl pivoted upon 1, the driving 1nember, a spring for urging the pawl toward and into coupling relation with the driven member, a reciprocatory bar, means actuated by the driven'member, for advancing said reciprocatory bar, said reciprocatory bar having means associated therewith for causing the movement of the work carrier, spring means for effecting the return movement to the reciprocatory bar, a latch, means for moving the latch under said, pawl, the reciprocatory bar having means to trip the latch on each backward movement thereof.

6. A machine of the class desc "ibe-d comprising a power-driving member, a driven memher to co-operate with the driving member, a work-carrier, a pawl pivoted upon the driving member, and automatically movable into coupling relation with the driven member,

a reciprocatory bar, means actuated by the driven member, for advancing said reciprocatory bar, said reciprocatory bar having means associated therewith for causing the movement of the work carrier, spring means for effecting the return of the reciprocatory bar, a latch, means for moving the latch under said pawl, the reciprocatory bar having means'to trip the latch on each backward movement thereof.

7. A machine of the class described comprising a power-driving member, a driven member to co-operate with the driving member, a toothed work carrier, a pawl pivoted upon the driving member, and automatically movable into coupling relation with the driven member, a recip-rocatory bar, means actuated by the driven member, for advancing said reciprocatory bar, said reciprocatory bar having a pawl for engaging the teeth of the work carrier for rotating the same, means for efi'ectingthe return movement to the reciprocatory bar, a

latch and means for moving the latch under said first pawl, the reciprocatory bar having means to trip the latch on each backward movement thereof.

8. A machine of the class described comprising a power-driving member, a driven member to co-operate with the driving member,.a peripherally toothed work-carwork carrier, a pawl pivoted upon the driving member and automatically movable into coupling relation with the driven member, a reciprocatory bar, means actuated by the driven member, for advancing said recipro eatery bar, the latter having means for causing the rotation intermittently of the work carrier, independent means for effecting the return movement of the recipro- 10 eatery bar, a latch, and a collar on the re- In testimony whereof I affix my signa- 15 ture.

URI D. FOSTER. In presence of-- MONROE GUETT, ROY M. OLES. 

